NEW YORK (AP) — Masood Masjoody had a long history of firing accusations at those he considered adversaries. So when he claimed on social media last fall that two fellow Iran-born activists were plotting to kill him, it did not get much notice. Then the mathematician disappeared in early February. By mid-March, police in British Columbia had found his body and brought first-degree murder charges against the pair Masjoody said were after him. It was startling news for Iranians outside the